The dark side
The portion of the personality that can see the world and people at the very worst. Loving the darkness and wishing daylight would never come, as it is a bright reminder of how many people are watching you. Not wanting another meaningless conversation and wishing for something more.
Envisioning being in a dark grey castle on the top of a mountain with no path, no way of any one accessing your fortress. Alone in a thunderstorm in your large library with your best friend, a black cat with shining golden eyes. Illuminated by candle light in this cold dark castle, one begins to wonder what their purpose is, why are they placed on earth as a minority that hardly gets recognized for their unique talents.
Sure an INFP can be friendly, intelligent, witty, helpful. Also have a vivid imagination that is far more interesting than most daily cumbersome chores. But depending on the day or circumstances the INFP can strike a cold sinister stare right through it's victim like a cold steel knife. The dark side is unleashed with thoughts of hurtful truths and enough sarcasm you could.. ice a sarcasm cake and still have enough left over for cupcakes!
Nothing is too morbid, gory or unbelievable for the INFP's dark side, a walk through a cemetery on Halloween during a full moon? Ideal